On 1/12/23 5:48 PM, Greg KH wrote:
On Fri, Jan 13, 2023 at 12:11:18AM +0800, rainkin wrote:
Hi,
My ebpf program based on libbpf(v0.7) causes the kernel 4.19 (ARM
machine) panic:
Kernel panic - not syncing: softlockup: hung tasks
CPU: 3 PID: 2524351 Comm: sshd Kdump: loaded Tainted: G
Call trace:
dump_backtrace
show_stack
dump_stack
panic
lockup_detector_update_enable
__hrtimer_run_queues
hrtimer_interrupt
arch_timer_handler_virt
handle_percpu_devid_irq
generic_handle_irq
__handle_domain_irq
gic_handle_irq
el1_irq
smp_call_function_many
kick_all_cpus_sync
bpf_int_jit_compile
bpf_prog_select_runtime
bpf_prepare_filter
bpf_prog_create_from_user
seccomp_set_mode_filter
do_seccomp
prctl_set_seccomp
__se_sys_prctl
__arm64_sys_prctl
el0_svc_common
el0_svc_handler
el0_svc
Then I test the same ebpf program on kernel 4.19 (x86 machine), the
kernel DOES NOT panic.
I test it on kernel 5.10 (ARM machine), the kernel DOES NOT panic.
Thus I guess this is a kernel bug related to ARM arch and has been
fixed in 5.10.
Does anyone know any kernel bug or patch related to this issue?
Can you use 'git bisect' to track down the commit that resolves this?
+1, @rainkin location wrt fixes is here:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/arch/arm/net
Thanks,
Daniel
